Nice sketches. I think you will find the apparent HF roll off is very welcome.
That calculated stuff looks great, don't be disappointed when real world measurements don't come out so good. Or don't measure! (see my primer)
I will offer a couple of tweaks.
More Bass Trapping is always welcome. I would change those stand mounted ones to another Superchunk or TriTraps mounted across the back in the Ceiling Wall corner junction. If you chose to do this you will need some HF treatment to stop a flutter echo between your behind window and front wall. A single MicroTrap worked for me. There will be strong flutter echo between those parallel walls behind you. There will also be flutter between that wooden floor and gyp ceiling behind you. Those flutters will be bad and will need HF treatment. A cloud or a rug. A wall hanging perhaps with 703 behind, or of course commercial panels.
Best Regards, DD
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